<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示信息 -->
      <el-alert
        title="消息提示的文案"
        type="info"
        center
        show-icon
        :closable="false"
      ></el-alert>

      <!-- 步骤条  -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form
        :model="addFrom"
        :rules="addFromRules"
        ref="addFromRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabCilcked"
        >
          <!-- 基本信息 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addFrom.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addFrom.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addFrom.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addFrom.goods_number"></el-input>
            </el-form-item>
            <!-- 级联选择器  catelist数据源  cateProps数据格数  addFrom.goods_cat选择器选择的数据 -->
            <el-form-item label="商品分类" prop="">
              <el-cascader
                expand-trigger="hover"
                :options="catelist"
                :props="cateProps"
                v-model="addFrom.goods_cat"
                @change="handleChange"
              >
              </el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              v-for="manyitem in manyTableData"
              :key="manyitem.attr_id"
              :label="manyitem.attr_name"
            >
              <el-checkbox-group v-model="manyitem.attr_vals">
                <el-checkbox
                  border
                  v-for="(item1, i) in manyitem.attr_vals"
                  :key="i"
                  :label="item1"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              v-for="item in onlyTableData"
              :key="item.attr_id"
              :label="item.attr_name"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 图片上传到的api地址  on-preview 预览事件 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              from
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addFrom.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
//导入先拷贝
import _ from 'lodash'
export default {
  data() {
    return {
      // 步骤条进度
      activeIndex: '0',
      // 添加商品数据
      addFrom: {
        goods_name: '',
        // 商品所属的分类数组
        goods_cat: [],
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 商品的属性
        goods_introduce: '',
        // 图片路劲临时地址数组
        pics: [],
        attrs: [],
      },
      addFromRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态参数
      onlyTableData: [],
      // 上传图片的url地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      // 预览图片
      previewPath: '',
      previewVisible: false,
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取商品分类
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.message.error('获取商品分类失败！')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 级联选择器选择对象发生变化时触发
    handleChange() {
      if (this.addFrom.goods_cat.length !== 3) {
        this.addFrom.goods_cat = []
      }
      // this.addFrom.goods_cat = this.addFrom.goods_cat.join(',')
      console.log(this.addFrom.goods_cat)
    },
    // 是否切换
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页：' + oldActiveName)
      // console.log('到达的标签页：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addFrom.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类！')
        return false
      }
    },
    async tabCilcked() {
      // console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        // console.log('证明访问的是动态参数面板')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        console.log(res)
      }

      if (this.activeIndex === '2') {
        // console.log('证明访问的是动态参数面板')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }
        // res.data.forEach((item) => {
        //   item.attr_vals =
        //     item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        // })
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
      // console.log(file)
    },
    // 处理图片移除
    handleRemove(file) {
      console.log(file)
      // 1.获取要删除图片的临时路劲
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中，找到这个图片对应的索引值
      const i = this.addFrom.pics.findIndex((x) => {
        x.pic === filePath
      })
      // 3.调用数组 splice 方法把图片的信息对象从pics数组中移除
      this.addFrom.pics.splice(i, 1)
      console.log(this.addFrom.pics)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1.先拼接，得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片信息对象push到pics数组中
      this.addFrom.pics.push(picInfo)
      console.log(this.addFrom.pics)
    },
    // 添加商品
    add() {
      // console.log(this.addFrom)
      this.$refs.addFromRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑 请求
        // 将数组转化为字符串
        // 先拷贝 lodash  cloneDeep(Obj)
        const form = _.cloneDeep(this.addFrom)
        form.goods_cat = form.goods_cat.join(',')
        //处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' '),
          }
          this.addFrom.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addFrom.attrs.push(newInfo)
        })
        form.attrs = this.addFrom.attrs
        console.log(form)

        // 发起请求添加商品
        // 商品名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    },
  },
  computed: {
    cateId() {
      if (this.addFrom.goods_cat.length === 3) {
        return this.addFrom.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style>
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 10px !important;
}
</style>